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Related Experiment Video

Updated: Feb 27, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
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Visual feedback explains why propointing is better than antipointing in spatial neglect.

Kathrin S Utz1, Constanze Hesse2, Annika Hintz1

  • 1Department of Neurology, Friedrich-Alexander University Erlangen-Nuremberg, Germany.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|June 27, 2017
PubMed
Summary

Neglect patients show deficits in antipointing tasks, challenging the idea that only perception is affected. Visual feedback and reference lines impact performance, suggesting egocentric bias plays a role in spatial representation disorders.

Keywords:
AllocentricAntipointingEgocentricPointingVisuomotor control

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Spatial representation disorders like neglect are often attributed to perceptual deficits.
  • Previous research suggested neglect primarily impacts perceptual spatial maps, sparing visuomotor guidance systems.
  • An alternative view posits that task demands, like online corrections and egocentric bias, exacerbate neglect symptoms.

Purpose of the Study:

  • To investigate the influence of visual feedback on pro- and antipointing tasks in patients with neglect.
  • To examine the effect of a visual reference line on antipointing performance in right-brain damaged patients with and without neglect, and healthy controls.
  • To challenge the hypothesis that neglect solely affects perceptual spatial representations.

Main Methods:

  • Comparative study involving right-brain damaged patients with neglect (n=20), without neglect (n=23), and healthy controls (n=22).
  • Assessment of pro- and antipointing tasks under conditions with and without visual feedback.
  • Evaluation of antipointing performance with and without a visual reference line.

Main Results:

  • Withdrawal of visual feedback disproportionately affected propointing more than antipointing, with a greater impact on neglect patients.
  • A visual reference line significantly reduced errors in antipointing, especially in neglect patients exhibiting strong egocentric bias.
  • The findings indicate that online-correction difficulties and egocentric bias contribute to observed deficits in neglect.

Conclusions:

  • The results challenge the notion that neglect is exclusively a disorder of perceptual spatial representations.
  • The study supports an alternative account where task-specific factors, including visual feedback and egocentric bias, significantly influence performance in neglect.
  • Spatial disorders in neglect may involve complex interactions between perception, visuomotor guidance, and egocentric reference frames.